Are you aware of any patients having allergic reactions to an Edwards Bovine Aortic Valve replaced via the TAVR procedure. I had mine replaced on September 9th and began to have hives a week later. I was on aspirin and Plavix, which I had taken before when having a stent and had not type of allergy to either. My Doctor changed me to aspirin 81mg and the same brand as I had taken prior to the procedure. He also changed me to Effient. Neither of these interventions have helped. Could the valve be the problem?